Abstract
A method of automatically determining the body outline directly from the projection data before reconstruction is developed. By reconstructing the emission data from the outside inward in polar coordinates, the use of projector bins which observed the hot heart is avoided. The outer most ring activity is determined by using only the data from the inner most detector bin which can observe that ring. The next ring inward is calculated by using the estimate from the outer most ring and subtracting its contribution from the next inward ring. Thus, this ring can then be treated as if it were the outer most ring. Comparisons of boundary detection algorithms which use the zero crossing of the second derivating of the reconstructed image with this algorithm demonstrate a significant increase in sensitivity to concave body outlines in cardiac SPECT using this algorithm.
Original language | English (US) |
---|---|
Pages | 944-948 |
Number of pages | 5 |
State | Published - 1995 |
Externally published | Yes |
Event | Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3) - San Francisco, CA, USA Duration: Oct 21 1995 → Oct 28 1995 |
Other
Other | Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3) |
---|---|
City | San Francisco, CA, USA |
Period | 10/21/95 → 10/28/95 |
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging